Clock



FIG. 1 is a top plan view of a clock showing my new design;

FIG. 2 is a right side elevational view thereof, the left side being a mirror image;

FIG. 3 is a right side elevational view thereof with the lid open, the left side being a mirror image;

FIG. 4 is a front elevational view of FIG. 3;

FIG. 5 is a top plan view of FIG. 3;

FIG. 6 is a rear elevational view of FIG. 3; and,

FIG. 7 is a bottom plan view of FIG. 3. 

The ornamental design for a clock, as shown and described. 